From b4b7ff4b08e691656c9d77c758fc355833128ac0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 20 Jan 2016 14:01:31 -0300 Subject: Linux-libre 4.4-gnu --- drivers/gpu/drm/vc4/vc4_bo.c | 52 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 drivers/gpu/drm/vc4/vc4_bo.c (limited to 'drivers/gpu/drm/vc4/vc4_bo.c') diff --git a/drivers/gpu/drm/vc4/vc4_bo.c b/drivers/gpu/drm/vc4/vc4_bo.c new file mode 100644 index 000000000..ab9f5108a --- /dev/null +++ b/drivers/gpu/drm/vc4/vc4_bo.c @@ -0,0 +1,52 @@ +/* + * Copyright © 2015 Broadcom + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +/* DOC: VC4 GEM BO management support. + * + * The VC4 GPU architecture (both scanout and rendering) has direct + * access to system memory with no MMU in between. To support it, we + * use the GEM CMA helper functions to allocate contiguous ranges of + * physical memory for our BOs. + */ + +#include "vc4_drv.h" + +struct vc4_bo *vc4_bo_create(struct drm_device *dev, size_t size) +{ + struct drm_gem_cma_object *cma_obj; + + cma_obj = drm_gem_cma_create(dev, size); + if (IS_ERR(cma_obj)) + return NULL; + else + return to_vc4_bo(&cma_obj->base); +} + +int vc4_dumb_create(struct drm_file *file_priv, + struct drm_device *dev, + struct drm_mode_create_dumb *args) +{ + int min_pitch = DIV_ROUND_UP(args->width * args->bpp, 8); + struct vc4_bo *bo = NULL; + int ret; + + if (args->pitch < min_pitch) + args->pitch = min_pitch; + + if (args->size < args->pitch * args->height) + args->size = args->pitch * args->height; + + bo = vc4_bo_create(dev, roundup(args->size, PAGE_SIZE)); + if (!bo) + return -ENOMEM; + + ret = drm_gem_handle_create(file_priv, &bo->base.base, &args->handle); + drm_gem_object_unreference_unlocked(&bo->base.base); + + return ret; +} -- cgit v1.2.3-54-g00ecf